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L'AMD Ryzen 7 4800U de 7 nm est aussi rapide que le Core i9-9880H de 14 nm et à la moitié du TDP, mais il y a un énorme retard

Le AMD Ryzen 7 4800U de 7 nm est aussi rapide que le Core i9-9880H de 14 nm et à la moitié du TDP, mais il y a un énorme retard (Source de l'image : AMD)
Le AMD Ryzen 7 4800U de 7 nm est aussi rapide que le Core i9-9880H de 14 nm et à la moitié du TDP, mais il y a un énorme retard (Source de l'image : AMD)
Un Ryzen 7 4800U à 8 cœurs 25 W cTDP peut-il surpasser le populaire i9-9880H à 8 cœurs 45 W ? Ils sont bien plus proches que ce que vous pourriez penser, du moins jusqu'à ce que vous commenciez à solliciter le processeur Ryzen sur de très longues périodes.
Allen Ngo, 🇺🇸 🇪🇸 ...
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Le Ryzen 7 4800U est le fleuron de la dernière série U de Zen 2 d'AMD. Contrairement à tous les autres processeurs de sa pile, le Ryzen 7 4800U à octa-cœur est remarquable par l'intégration de 16 threads d'exécution simultanée dans une enveloppe de puissance de 15 à 25 W, contre seulement 8 threads sur la plupart des autres processeurs de la série U. Intel n'a actuellement aucun équivalent à cet égard, jusqu'à ce que vous commenciez à passer à ses processeurs de la série H à 45 W, comme le Core i9-9880H de 9e génération ou le Core i7-10875H de 10e génération. Cela soulève la question : Comment le Ryzen 7 4800U se compare-t-il au Core i9-9880H, plus gourmand en puissance ?

Apparemment, le processeur Ryzen peut fonctionner beaucoup plus près du Core i9-9880H que ce que l'on attendait initialement, compte tenu de l'époque à laquelle nous vivons avec le Lenovo IdeaPad 14 Ultrabook 14 pouces. Tous les benchmarks testés comme CineBench, Blender, 7-Zip, GeekBench, HWBOT et LibreOffice montrent des points de pourcentage à un chiffre entre le Ryzen 7 4800U de notre Lenovo et le Core i9-9880H moyen de notre base de données. Quelle que soit la façon dont vous le découpez, ces résultats constants sont impressionnants pour AMD, surtout si l'on considère les performances par watt beaucoup plus élevées en jeu.

Ce n'est pas un coup de circuit pour AMD, cependant, car les limites du Ryzen 7 4800U sont révélées lorsqu'il est soumis à des charges extrêmes pendant de longues périodes sans période de refroidissement entre les deux. En faisant tourner le CineBench R15 xT en boucle, par exemple, le score initial élevé de 1620 points chuterait et se stabiliserait à environ 1210 points à la 5e ou 6e boucle. Cette baisse de 25 % des performances est plus marquée que sur n'importe quel ordinateur portable Core i9-9880H que nous avons testé jusqu'à présent.

La baisse de performance du CPU peut être observée plus en détail lors de l'exécution de Prime95 également. La fréquence d'horloge passerait de 3,5 GHz à 4,3 GHz pendant les premières secondes seulement, avant de chuter régulièrement et de se stabiliser à 2,3 GHz et à une température centrale de 60 à 65 °C. Sinon, la température centrale dépasserait largement 90 °C selon HWiNFO, ce qui suggère que le processeur pourrait fonctionner plus rapidement sur des ordinateurs portables de plus grande taille.

Comme le Ryzen 7 4800U est si récent, nous devrons attendre de voir ce que d'autres fabricants de matériel informatique pourront faire avec le processeur en dehors de Lenovo. Son TDP configurable devrait permettre une large gamme de conceptions de châssis compatibles et donc un large éventail de différences de performances entre les modèles.

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Lenovo Yoga Slim 7-14ARE Vega 8 R4000, R7 4800U, Samsung SSD PM981a MZVLB512HBJQ; CPU Multi 64Bit: Ø1238 (1192.82-1622.45)
MSI GE75 9SG GeForce RTX 2080 Mobile, i9-9880H, Samsung SSD PM981 MZVLB1T0HALR; CPU Multi 64Bit: Ø1619 (1602.44-1728.31)
Asus Strix Scar III G531GW GeForce RTX 2070 Mobile, i9-9880H, Intel SSD 660p 1TB SSDPEKNW010T8; CPU Multi 64Bit: Ø1267 (1239.62-1311.65)
MSI P65 Creator 9SF-657 GeForce RTX 2070 Max-Q, i9-9880H, 2x Samsung SSD PM981 MZVLB512HAJQ (RAID 0); CPU Multi 64Bit: Ø1439 (1417.84-1545.36)
HP Omen 17-cb0020ng GeForce RTX 2080 Mobile, i9-9880H, 2x Samsung SSD PM981 MZVLB512HAJQ (RAID 0); CPU Multi 64Bit: Ø1291 (1278.24-1450)
Apple MacBook Pro 16 2019 i9 5500M Radeon Pro 5500M, i9-9880H, Apple SSD AP1024 7171; CPU Multi 64Bit; macOS 10.15.1: Ø1407 (1386-1435)
Apple MacBook Pro 16 2019 i9 5500M Radeon Pro 5500M, i9-9880H, Apple SSD AP1024 7171; CPU Multi 64Bit; Win 10: Ø1296 (1268.87-1362.31)
Apple MacBook Pro 15 2019 i9 Vega 16 Radeon Pro Vega 16, i9-9880H, Apple SSD AP0512; CPU Multi 64Bit: Ø1238 (1170.34-1317.35)
MSI GE65 Raider 9SF-049US GeForce RTX 2070 Mobile, i9-9880H, Samsung SSD PM981 MZVLB1T0HALR; CPU Multi 64Bit: Ø1496 (1486.55-1622.78)
Cinebench R20: CPU (Multi Core) | CPU (Single Core)
Cinebench R15: CPU Single 64Bit | CPU Multi 64Bit
Blender 2.79: BMW27 CPU
7-Zip 18.03: 7z b 4 -mmt1 | 7z b 4
Geekbench 5.3: 64 Bit Single-Core Score | 64 Bit Multi-Core Score
HWBOT x265 Benchmark v2.2: 4k Preset
LibreOffice : 20 Documents To PDF
R Benchmark 2.5: Overall mean
Cinebench R20 / CPU (Multi Core)
Average Intel Core i9-9880H
  (2953 - 3712, n=7)
3271 Points ∼100% +2%
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
3213 Points ∼98%
Cinebench R20 / CPU (Single Core)
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
474 Points ∼100%
Average Intel Core i9-9880H
  (441 - 474, n=7)
459 Points ∼97% -3%
Cinebench R15 / CPU Single 64Bit
Average Intel Core i9-9880H
  (181 - 198, n=11)
190 Points ∼100% +6%
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
180 Points ∼95%
Cinebench R15 / CPU Multi 64Bit
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
1568 Points ∼100%
Average Intel Core i9-9880H
  (1317 - 1721, n=11)
1506 Points ∼96% -4%
Blender 2.79 / BMW27 CPU
Average Intel Core i9-9880H
  (293 - 384, n=4)
337 Seconds * ∼100% -5%
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
322 Seconds * ∼96%
7-Zip 18.03 / 7z b 4 -mmt1
Average Intel Core i9-9880H
  (4837 - 5068, n=3)
4943 MIPS ∼100% +11%
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
4436 MIPS ∼90%
7-Zip 18.03 / 7z b 4
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
44804 MIPS ∼100%
Average Intel Core i9-9880H
  (39455 - 46591, n=3)
42728 MIPS ∼95% -5%
Geekbench 5.3 / 64 Bit Single-Core Score
Average Intel Core i9-9880H
  (1115 - 1237, n=2)
1176 Points ∼100% +2%
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
1154 Points ∼98%
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
1150 Points ∼98% 0%
Geekbench 5.3 / 64 Bit Multi-Core Score
Average Intel Core i9-9880H
  (7109 - 7353, n=2)
7231 Points ∼100% +4%
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
6950 Points ∼96%
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
5798 Points ∼80% -17%
HWBOT x265 Benchmark v2.2 / 4k Preset
Average Intel Core i9-9880H
  (10.6 - 11.9, n=3)
11.2 fps ∼100% +4%
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
10.768 fps ∼96%
LibreOffice / 20 Documents To PDF
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
57.8 s * ∼100%
Average Intel Core i9-9880H
  (16.5 - 58.9, n=3)
41.7 s * ∼72% +28%
R Benchmark 2.5 / Overall mean
Average Intel Core i9-9880H
  (0.621 - 0.69, n=3)
0.657 sec * ∼100% -7%
Lenovo Yoga Slim 7-14ARE
AMD Ryzen 7 4800U
0.613 sec * ∼93%

* ... Moindre est la valeur, meilleures sont les performances

Prime95 met l'accent sur le Lenovo IdeaPad 14 équipé du Ryzen 7 4800U. Notez la baisse constante de la fréquence d'horloge du CPU
Prime95 met l'accent sur le Lenovo IdeaPad 14 équipé du Ryzen 7 4800U. Notez la baisse constante de la fréquence d'horloge du CPU

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Allen Ngo
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> Revues et rapports de ordinateurs portatifs et smartphones, ordiphones > Archives des nouvelles 2020 08 > L'AMD Ryzen 7 4800U de 7 nm est aussi rapide que le Core i9-9880H de 14 nm et à la moitié du TDP, mais il y a un énorme retard
Allen Ngo, 2020-08-28 (Update: 2020-08-28)